S. Fedosov Samara State Technical University
,
Galaktionovskaya 141
,
Samara 443010
,
Russia
金属学报(英文版)
"Thermo" computer program is described. It is intended for computation of thermal cycle parameters during surface pulse heating. For example, during laser processing, surface heating owing to grinding, etc. It gives rates of heating, cooling, as well as temperature gradients and cumulative exposure time as function of the CURRENT TEMPERATURE, with the peak temperature at the surface as variable parameter. The indicated parameters are calculated at a surface, close to a surface (at 0.01μm)and for the points at a depth of the body. Demo ver. of the software: http://www. sstu.samara.ru/physics/fedosov/thermo_d. zip
关键词:
heat transfer
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S. Fedosov (Samara State Technical University
,
Galaktionovskaya 141
,
Samara 443010
,
Russia)
金属学报(英文版)
This paper Presents experimental data on effect of carbon concentration and laser processing regimes on retained austenite quantity. The data on retained austenite decomposition during subsequent temperings at various temperatures as well as after holding at room temperature during 3 years are given.Correla- tion between structural broadening of the X - ray lines of retained gamma - phase and the amount of the latter has been discovered.Mechanisms responsible for the increased quantity of the retained austen- ite in carbon and low alloyed steels after laser hardening are described.
关键词:
retained austenite
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